Liquid-gage.



F. l. & B. P. REMY L A'. BERGER.

LIQUID VGAGE.

APPLICATION FILED JAN-10,1916. 1,28L65. Patented Oct. 15, 1918.

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EE-JLE-...E 20 1- l-l UNITED ST v8 FATENT QFFICE.

v FRANK I. REMY AN BENJAMIN P. REMY, 0F INDIANAPOLIS, AND ARTHUR BERGER,

0F ANDERSON, INDIANA, ASSIGNORS TO REMY BROTHERS COMPANY,A 0F ANDERSON,

INDIANA, A COPARTNERSHIP.

LIQUID-GAGE.

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Specification of Letters Patent.

Patented Oct. 15, 1918.

Application led January 10, 1916. Serial No. 71,335.

The object of this invention is to improve the means for indicating the quantity vof liquid in a tank so that the gagewill be reliable. Another object is to have an arrangement whereby the indicator may be l0- cated at some distance from the tank so as to make the deviceconvenlent for mounting in an automobile. Another object is to have such an electrical device that it will automaticallyfcompensate for changes in temperature and changes in the battery strength. Another Objectis to render the device readily adaptable for tanks-of varying depths, with a' minimum amount of change `in installation.

The chief feature of this invention consists in such an arrangement of means for. controlling the action of the galvanometer according to the quantity of. liquid in the tank as to render needless any resistance outside of the tank. It also makes it needless to employ any means to maintain a constant electro-motive force. This is accomplished by providin a resistance unit in the tank connectedwith one endr of the coils in the galvanometer and located beside a conductor in the tank having practically no resistance and electrically connected with the other ends' of the' coils in the galvanometer. A float in the tank electrically connects the non-resistance means and the resistance coil in the tank at the surface ofthe fluid and thus varies the resistance'.

- The full nature of the invention will be understood from the accompanying drawings and the following descriptlon and claims.

' In the drawings, Figure 1 is an illustration of thev linvention showing the gage in eleva tion with a portion of the front plate broken away, the fluid tank in vertical central section. and the electrical connections diagrammatic. Fig. 2 1s a section on the line 2-2 of 'larly adjustable in said Casing and secure in adjusted position by a set screw 14. In said plate 11 there is a curved slot 13 adjacent which there are graduation marks and numerals indicating the contents of the tank. The'angular adjustment referred to is to enable said graduations to be adjusted to suit varying conditions of the remainder of the device and so that said graduations will correctly indicate the contents of the tank.

Within the casing 10 there is a pair o coils 18 and 19 secured to the back Wall of the casing and concentric with each other. The axes of the two coils are approximately at 90 degree angles to each other. A needle bar 15 is centrally fulcrumed on a rod 16 mounted in the center of said coils so that the similar poles of said two coils will correspondingly iniuence said needle according coils 18 and 19 are in a divided circuit so that when current is passed through them there will bea resultant north and south ole line substantially in the direction of the l needle 15. The direction of this north and south pole line will depend upon the strength of the current passing through each coil and the needle will take a positionin line with such north and south pole line.

The fluid tank 20 has mounted in it centrally and vertically a non-resistance rod or conductor 21 and insulated from the tank and connected at its upper end by lines 22 with a switch or push button 23, battery 24, lines 25 and 26 connecting with one'end of each of the coils 18 and 19 in a gage or galvanometer.

There is also mounted within the tank a non-conducting rod 28 parallel with the conducting rod` 21' and insulated from the tank. The lower, ends of both of said rods 21 and 28 are mounted in a non-conducting block 29. yA resistance coil 30 surrounds spirally said non-conducting rod 18 and is insulated from the rod 21 by an insulating strip 31 eX- tendin from end to end. The upper end of the resistance coil 30 is connected by a line 32 with the lower ends of the coil 18 in the deo sistance coil at substantially the top of thev iiuid and thus divide .the resistance inl said resistance unit according to the quantity of Huid in the tank. This-electrical connection is accomplished by means of metal balls 36 galvanometer and back to the battery. If

which lie on the opposite sides of the insulating strip 31 and between the bars 21 and 28 and within a central opening 37 in the fioat -and are supported loosely in said situation by the ball supports 38 extending down from the lower side of the fioat. balls are always held in electrical contact with rod 21 and bar 3.0 at the uid level and readily moved up or down with the float.

When the switch or push button 23 is closed, the circuit from the battery enters the nonresistance rod or conductor 21 and crosses the connection in the iioat and divides in the resistance coil 30, part going toward the up-V per end'and part toward the lower end and then to the respective coils 18 and 19 in the the tank be empty the float will be at the bottom andthere will be practically no resistance upon the part of the coil which comes from the end of the resistance unit in the tank, but all of the resistance would be through-the upper end and' consequently the magnetic influence on the coil 19 would'be much greater than on the coil l18, thuscausing the indicating needle to point tothe word Empty. If the tank shouldxbe substantially halifull, as shown, the two ends ofthe resistance coil would be of equal strength and, therefore the magnetic iniuence of the coils 18 and 19 would be equal and the indicator would be at the'mid'way point.

Thus the indicator :would be modified in accordance with the position of the float and the quantity of the fluid in the tank, from full to empty. Thus it is Seen that the device is reliable and the indicator can be located at considerable distance from the tank and changes in temperature or battery A' strength do not aiiect its reliability and by manufacturing the portion for the tank long enough for long tanks the same can be readily shortened or cut off to suit the'depth of smaller tanks while installing this device.

The invention claimed is:

. 1. A device ofthe kind described including an electrically operated gage with coils therein, a liquid tank, a conducting rod in said tank and connected with one end of the Therefore, the

ltherein, a liquid tan a con .tending lvertically in said tank and conynected with one end ofthe coils in thegage,

coils in the gage, a resistance coil in said tank parallel with' and insulated from said conducting Irod and with its ends electrically connected .with the other ends of the respective coils in the gage, a ioat in said tank and spherical' members oatably positioned in said iioat and adapted to electrically connect said. conducting rod and resistance coil. l

2. A device of the kind describedincluding an electrically operatedl gage with coils therein, a liquid tank, a conducting rod eX- tending vertically in said tank and connected with one end of the coils in the gage, a non-conducting rod in said tank parallel withjsaid conducting rod, a resistance coil surrounding said non-conducting rod and with its'ends lelectrically connected with the other ends of therespective coils in the gage, and a fioat surrounding said rods and resistance coil in the tank and electrically connecting the. vconducting rodl and resistance:

.fcoil thereim The operation of the device is as follows:

3. A device of the kind described including an electrically operated gage with coils therein, a liquid tank, a conducting rod'extending vertically in said tank and connected with one end of the coils in the gage, a non-conducting rod in said tank parallel v,with said conducting rod, a resistance coil surrounding said non-conducting rod and with its ends electrically connected with the other ends of the respective coils in the gage,

a `strip of insulation secured to said conductingjrod and between it and the resistance coil, and a oat surrounding said rods land resistance coil in the'tank and electrically.- connecting the conducting rod and resistance'coil therein. f

f1; A device of the kind described including an electrically o erated age with coilsucting" rod eX- a non-conducting rod in said tank parallel" with said/"conducting rod, a resistance coil surroundlng said non-conducting rod and with its ends electrically connected with the other ends of the respective coils in the gage, said conducting rod and insulating rod being supported from the top of the tank and' with their lower ends separated from the bottom of the tank, an ins-ulating block secured to the lowervends of said rods, and a float surrounding said rods and resistance coil in the tank and electrically connecting the conducting rod and resistance coil therein.

5. A device of the kind described including an electrically operated gage with coils therein, a liquid tank, "a conducting rod eX- tending vertically in said tank and connected with one end of the coils in thexgage, a non-conducting rod in said tank parallel with said conducting rod, a resistance coil ing rod and resistance coil, and means conball engaging said .conductnected with the float for loosely supporting said balls. l lo In witness whereof We have hereunto af- Y fixed our signatures v FRANK 1, REMY.. BENJAMIN P. REMY. ARTHUR BERGER. 

